Burning waxed synthetic thread ends - question

[Alaisiagae]

I bought a safety lighter to burn the ends of my waxed nylon/polyester threads (waxed braided nylon cord, primarily), and it's been working pretty well, despite the flame being a little unnerving. But sometimes I need to get into a tight corner and there's a risk the flame will singe the leather. I was browsing Amazon and spotted this on the related products page for a Thread Zapper, it's an electric arc lighter. Has anyone ever used one of these to burn their thread? Does it work as well as the old lighter method?

Edited August 21, 2020 by Alaisiagae

[GatoGordo]

I use the Thread Zap II. I tried using a simple BIC lighter, but that was unwieldy. I then tried my butane cigar lighter. That was fine unless I got too close to the leather and singed it. It also had problems in the corners as you also discovered. The Thread Zap II works for me.